Struggling with getting a regular expression for the RegularExpressionValidator to function properly on the client side:
(?=.{8,})(?=.*[A-Z])(?=.*[\d])(?=.*[\W])|(?=.*[a-z])(?=.*[\d])(?=.*[\W])|(?=.*[A-Z])(?=.*[a-z])(?=.*[\W])|(?=.*[A-Z])(?=.*[a-z])(?=.*[\d])
This expression should return true if the provided string meets the following criteria:
- Contains at least eight characters
- Features at least one character from three of the four groups: "lower case letters," "upper case letters," "digits," and "special characters"
While using this expression in C# (.NET 3.5) produces expected results for various test strings, it fails to work within the client browser environment. For example, a valid string like aaaaBBB1 does not pass validation.
After exploring a related thread, I learned that JavaScript implementation differs slightly from .NET, possibly explaining the discrepancy between server-side and client-side behavior.
To investigate further, I tested my regular expression in JavaScript, which surprisingly works identical to the C# implementation. This leaves me puzzled why the RegularExpressionValidator fails on the client side even though JavaScript execution is successful.
If anyone can offer guidance on how to resolve this issue and make the RegularExpressionValidator function as intended, it would be greatly appreciated.
Thank you,